Napping machine



July 23, '1929. F. BRUNNER 1,721,935

NAPPING MACHINE Filed April 11, 1 928 4 Sheets-Sheet l g M N.

I July 23, 1929.

F. BRUNNER NAPPiNG Filed April 11, 1928 mcnmn:

4 Sheets-Sheet 2 July 23, 1929; F. BRUNNER ,7 1,98

NAPP lNG MACHINE Filed April 11, 1928 v 4 Sheets-Sheet 4 flexible in a known manner.

Patented July 23, 1929.

nnrrae stares laziest eaian'r ere-tea.

FRANZ BRUNNER, OF ERZGEIBIRGE, GERMANY.

INAPPING MACHINE.

Application filed April 11, 1928, Serial No. 269,137, and in Germany March 3, 1927 In order to obviate the known defects of the belt drive of the two cylinder groups, it has already been proposed that conical driving discs should be fixed upon the ends of the cylinders and allowed to lie against the .in-

ternal surface of an oppositely conical and unrotatable ring, so that they roll in contact with it when the drum rotates. Such rings have been known either in a unit construction or in a multi-pait construction and they. are arranged transversely movable, so that they can act upon desired points of the cones mounted upon the spindles of the cylinders and so effect a variation in the velocity of the cylinders. The one-piece ringwas divided at one place and provided with a tensioning levice in order to adjust it in its circumference, according to its working position, to the corresponding diameter of the conical members upon the separate spindles of the cylinders.

ith the transmission of motion from a conical ring to the conical members of the cylinders there arises, however, as is known, considerable friction with corresponding wear, since only in one position (the middle one) does a perfect running occur, whilst on both sides of the middle plane of the ring there is an acceleration or retardation, and thus a sliding action takes place.

According to the present invention the device is so arranged that cylindrical friction discs and also a cylindrical ring, in which they run, are employed. This has at the same time the advantage, that the employ ment of an actual metal ring is not'essential, but a belt can be employed in its stead. the adjustment or variation of the velocity of rotation of the carding cylinders the friction discs, connected with them in a suitable man-.

ner, are capable of adjustment in the radial direction of their ring or bolt, the ring and belt of course, being constructed so that they can be varied as regards diameter or are lVhether the ring formed and divided after the manner of the known piston rings, acts simply by its own elasticity or whether tensionsprings are employed for it, is of no importance, it is es sential that the ring and friction discs are formed cylindrical, so that a sliding action on account of acceleration or retardation as before described, cannot occur at all.

In the drawing several constructional examples are illustrated by way of example For Fig. 1 shows a partial longitudinal section of the carding drum.

Fig. 2 a side elevation, Fig. '3 a partial plan, b Fig. 4 a form of construction with a fixed Fig. 5 another form of construction with a moving belt, in side elevation. Fig. 6 a partial front elevation of Fig. 5, Fig. 7 a partialfront elevation on an enlarged scale.

a Fig; 8 a partial front elevation of Fig.7.

Fig. 9 is a section through another type of napping roller drive. V

Fig. 10 shows the course of the material to" be napped over the'nappin'g' roll drums. On the machine platform 103 is journalled. the shaft 102 of the napping roll drums. on

shaft 102, Fig. 10, are seated the two drum stars 2 which on their periphery carry the napping rolls 1. The napping roll drum is" rotated during the operation in the direction of the arrow, and the individual napping rolls also rotate about their own axes. The material to be napped 37, as shown in Fig. 10', is carried around over tension rolls 36 in such a way about the napping roller drum that it touches the napping roller drum atvarious points. In the constructional example shown in the drawing the material to be napped touches the napping rolls at three points. To obtain various napping effects it is necessary to make the peripheral speed of the napping rolls about" their own shafts avariable one.

In Fig. 1 the ends of two napping cylinders l are shown, which are held in the star frame 2' of the drum by means of the ball bearing 3 in a known manner. The casing 4 of the ball bearing is formed as a sleeve and carries the ball bearing 3 centrally at one side and therotatable hollow pin 5 eccentrieally at the other side. The cylindrical hollow pin 5 carries at its free end a small spindle 6 movable longitudinally but prevented from rotating; the spindle 6 is connected to the pin of the napping cylinder by means of a flexible spindle piece 7.

The free end of the hollow pin 5 carries two friction discs 8 and 9 sideby side covered with leather or vmade of cardboard or some other suitable material. The disc 8 has a greater diameter than the disc 9'. fiat hollow cylindrical ring 10 envelopes the discs 8. This ring is divided underneath (Fig. 2) like a piston ring, and is so secured to the frame of the machine at one or more places that it cannot rotate, but can stretch and contract. For this purpose the ring 10 is to be provided .with a projection 11 (Figs. 2 and 3) which .has a slot 109, through which a screw 11 passes. This screw is threaded into a projection 112 of the machine frame 103. By means of this connection the ring 10 can be moved up and down within certain limits so that the radial motion of the rolls 8 and 9 can be followed.

.pins 5 mounted eccentrically in them either approach the spindle of the napping drum or move away from it accordingto their position at the time. The circle, upon which the geometrical axes of the discs 8 and the discs 9 lie, is thus made correspondingly smaller or greater. The ring 10, which embraces the discs 8 resiliently, follows the inwards and outwards movement of the discs 8, and it thus becomes correspondingly smaller and greater, so that the ratio of the transmission varies accordingly. Since, however, the friction discs 8 and 9 are made of soft material, they might be pressed flat or oval with a. great internal tension of the ring. Between the friction discs, thelefore,'and in extension of the napping cylinders, which are driven from the other side, a number of steel rollers 14: are located which are displaced in exactly the same degree by means of the eccentrically mounted pins 5 as the friction discs 8 and 9. These rollers, which run upon the ring 10 like i the friction discs are'provided in a known manner with rims and guide the ring laterally. The rollers 14 and the internal tension of the ringensures approximately the same contact pressure in every position.

The radial displacement of the friction discs 8 is effected by the rotation of the wheel 13, which is provided for this purpose,,with oblique internal teeth 113 upon a part of its hub, inwhich the wheel 16 (Fig. 1) engages by means of a correspondingly formed ring of teeth 119. If the threaded cylinder 17 is now displaced in the longitudinal direction by the rotation of the threaded sleeve 18then. the wheel 13 is rotated by the oblique teeth of the wheel 16 and consequently the sleeves 4t rotate and thus displace the friction discs 8 and 9 and the rollers 14. The sleeve 18 is formed as a chain wheeland is caused to rotate by means of the chain wheel 19 in connection with'a hand wheel 20 (Fig. 3). Since the oblique-toothed wheel 16 is keyed on the star frame 2 of the drum at 116, but can be i moved in the longitudinal direction by means of the threaded cylinder 17 which cannot rotate, and is keyed upon the hollow spindle 117 at 118, the rotation of'the wheel 13 can be effected even while the machine is running. The Wheel 13 is constantly carried along during rotation of the star-frame 2 of the drum by means of the teeth of the wheel 16. The adjustment device is not mounted upon the spindle 102 of the drum, but upon the long sleeve 117 connected with the bearing of' the drum for the purpose.

0 The belt 21 which may be used instead of the ring 10 is secured at a point 22 and is led at the other end over a roller 23 an d tensioned by a weight 24 (Fig. 9). Instead of the friction discs 8 and 9 corresponding belt discs 110 are used. The radial displacement of the belt discs is the same as for the friction wheel discs according to Figs 1 to 3.

For special napping effects, belt discs 25 of greater diameter are employed for the purpose as according to Fig. 5, and consequently they require their own drive in the opposite sense of rotation of the drum. With the known napping machines the napping effect is obtained by the variation of the velocity of the belt as previously mentioned. lVith the arrangement according to Figs. 5-8, however, the velocity of the belt 125 is constant, so that the most simple kind of drive may be employed.

The variation in the peripheral speed is effected in the same way as in the construction of Figs. 1 to 4. By the rotation of the napping roll bearing support 1, the part 5, which is journalled at 4, and which carries the pulley 110, is moved. toward or away from the drum shaft. 7 In this way the belt periphery on which the pulley 110 rolls is decreased and correspondingly the peripheral speed of the napping rolls 1, referred to the drum periphery decreases. In the useof belt drive for the napping roll rotation the rolls 141 can be dispensed with as thetension of the belt prevents from the outset any sidewise slipping.

The belt 125 running over a tension roller 51 is driven constantly by means ofthe spin dle of the drum and by the brush drive for the purpose. The cleansing brushes 8 and 9 are driven separately one to the left from the napping cylinder, the other to the right. For this purpose a main gear wheel 26 and a gear pinion 27 are located upon each side of the spindle of the drum. One brush is driven by the wheel 28, the other upon the opposite side by the wheels 27, 29 and 30. The brushes are mounted in swinging levers 31, which are rotatable about the pin of the wheel 27, which has the advantage that the toothed wheels always remain in the same engagement when the adjustment is effected.

The constant drive of the moving beltis rye-1398a effected by a wheel 27 in this manner, namely that the spindle 34' with the driving disc 35 is v ciatednapping rolls, said means comprising driven from the main wheels 32, 33. The wheels 32 and 33 are constructed as so-called double wheels, sothat the gear spindle can be driven with two degrees of speed. Thus the same purpose is served as by means-of the two friction discs 8 and 9.

A shaft 3% is provided'with two wheels 33 of different diameters. Each of these wheels meshes with a correspondingwheel 32 which are of correspondingly different diameters. It will thus be seen that the belt drive'may' be effected through either of the pairs of Wheels 32, 33, and that a different speed-ratio may be obtained with each pair. After the pulleys have become worn with long use, and it is desired to increase the speed of the napping rolls, the first wheel pair 32, 33 is disengaged inany suitable way and the second pair is thrown into operation for increasing the drive ratio.

I claim: I

1. In a napping machine, the combination with av rotatable support, of a plurality of napping rolls-mountedv thereon for rotation about axes parallel to the axis of the support and at substantially equal distances therefrom, a driving element associated with each of said rolls and coupled thereto for rotative movement, means shiftable with respect to the axis of the support for engaging said elements to rotate the latter, and means for moving said elements toward and away from the axis of rotation of said support to vary the speed of rotation of the elements and associated napping rolls.

2. In a napping machine, the combination with a rotatable support, of a plurality of napping rolls mounted thereon for rotation about axes parallel to the axis of the support and at substantially equal distances therefrom, a driving element associated with each of said rolls and coupled thereto for rotative movement, means shiftable with respect to the axis of the support for engaging said elements to rotate the latter, means for moving said elements toward or away from the axis of rotation of said support to vary the speed of rotation of the elements and associated napping rolls, said means comprising eccentric bearings for said rolls, and mechanism for simultaneously rotating said bearings.

3. In a napping machine, the combination with a rotatable support, of a plurality of napping rolls mounted thereon for rotation about axes parallel to the axis of the support and at substantially equal distances therefrom, a driving element associated with each of said rolls and coupled thereto for rotative movement, means shiftable with respect to the axis of the support for engaging said elements to rotate the latter, means for moving said elements toward or away from the axis of rotation of said support to vary the speed of rotation of the elements and asso' eccentric bearings for said rolls provided with toothed portions, and a gear meshing with said toothed portions.

4. In a napping machine, the combination with a rotatable support, of a plurality of napping'rolls mounted thereon for rotation about axes parallel to the axis of the supportand at substantially equal distances therefrom, a driving element associated with eachof said rolls and coupled theretofor rotative movement, means shiftable with respect'to the axis of the support for engaging said elements to rotate the latter, means for moving said elements toward or away from the axis of rotation of said support to vary the speed of rotation of the elements and associated napping rolls, said means comprising eccentric bearings for said rolls provided with toothed portions, a gear rotatably mounted on said support and meshing with said toothed portions, and a member shiftable axially of the support and reacting from the support to rotate said gear. 1

5. In a napping machine, the combination witha rotatable support, of a plurality of napping rolls mounted thereon for rotation about axes parallel to the axis of the support and at substantially equal distances therefrom, a driving element associated with each of said rolls and coupled thereto for rotative movement, means shiftable with respect to the axis of the support for engaging said elements to rotate the latter, means for moving said elements toward or away from the axis of rotation of said support to Vary the speed of rotation ofthe elements and associated napping rolls, said means comprising eccentric bearings for said rolls provided with toothed portions, a gear rotatably mounted on said support and meshing with raid toothed portions, said gear being re tained against axial movement on the support, and an axially shiftable member acting between said gear and support by means of a threaded connection with one and a splined connection with the other for rotating said gear.

6, In a napping machine, the combination with a rotatable support, of a plurality of napping rolls mounted thereon for rotation about axes parallel to the axis of the support and at substantially equal distances therefrom, a driving element associated with each of said rolls and coupled thereto for rotative movement, means shiftable with respect to the axis of the support for engaging said elements to rotate the latter, means for moving said elements toward or away from the axis of rotation of said support to vary the speed of rotation of the elements and associated napping rolls, said means comprising eccentric bearings for said rolls provided with toothed portions, a gear rotatably mounted on said support and meshing with said toothed portions, said gear being retained against axial movement on the support, an axially shiftable member acting between said gear and support by means of a threaded connection with one and a splined connection with the other for rotating said vgear, and a screw and nut mechanism for placement of the friction rollers relativeto the axis of rotation of the support, an expansible band engaging the rollers to impart rotation thereto, and means for displacing said rollers and band radially to vary the speed of rotation thereof.

8. In a napping machine, the combination with a rotatable support, of a plurality of napping rolls mounted for rotation thereon, a friction roller associated with each napping roll, a flexible spindle connecting each napping roll for rotation with the corresponding roller and permitting radial displacement of the friction rollers relative to the axis of rotation of the support, an expansible band held against rotation for engaging the rollers to impart rotation thereto, and means for displacing said rollers and band radially to vary the speed of rotation thereof.

9. In a napping machine, the combination with a rotatable support of a plurality of napping rolls rotatably mounted on said support, a pair of friction rollers of different diameter connected for rotation with each roll, and means adapted for selectiveengagement with one of each pair of friction rollers for imparting different speeds of rotation to the rollers and to the corresponding napping rolls.

10. In a napping machine, the combination with a rotatable support, of a plurality of napping rolls rotatably mounted on the support at substantially equal distances from the axis thereof, a pair of friction rollers of different diameter connected for rotation with .each napping roll, and an extensible band FRANZ BRUNNER. 

